Full list of all 54 Sunless Sea achievements.
The base game contains 30 achievements, and there is 1 DLC pack containing 24 achievements.
Visit the Surface
Achieve Antiquarian 10
Send your child to zee
Die 10 times in an unbroken lineage
Recruit the imaginary officer
Take the Rival legacy
Let your terror reach 100
Spend one year out at zee in an unbroken lineage
Create an ironclad will
See Hunter's Keep burn
Die 5 times in an unbroken lineage
Let your terror reach 90
Discover The Dawn Machine
Achieve Admiralty's Favour 10
Take the Salvager legacy
Woo a sweetheart in London
Take the Shipmate legacy
Die for the first time
Download new stories
Spend five years out at zee in an unbroken lineage
Spend ten years out at zee in an unbroken lineage
Acquire the Eschatologue-class Dreadnaught
Discover 'The Eye'
Suffer Salt's Curse
Suffer Stone's Curse
Suffer Storm's Curse
Take the Pupil legacy
Take the Correspondent legacy
Complete the game without saving manually
Complete the game without ever choosing a past
Accept a power of the deep zee
Use an oasis to increase your oxygen levels
Discover Rosegate
Escape underwater combat by resurfacing
Avoid being killed by the Unexploded Unclear Bomb
Discover Dahut
Discover Nook
Use underwater currents to bear you on your way
Discover Wrack
Discover Scrimshander
Discover Low Barnet
Discover Hideaway
Discover Anthe
Discover Undercrow
Come face to face with the Constant Companion
Discover The Gant Pole
Venture beneath the waves
Discover Aigul
Die of suffocation
Be killed by an underwater creature
Be killed by the Constant Companion
Perform an abyssal ritual to encounter Lady Black
Complete the Zubmariner ambition
Collect all of Drownie Love-song, Drownie Counterpoint and Drownie Hymn